1. The Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong Special Administrative Region, China
2. School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
3. School of Public Health, Nanjing Medical University, Nanjing, China
4. Stanley Ho Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Hong Kong Special Administrative Region, China